Foul Fuel

[jhfj80]

My '91 fj80 has a foul fuel odor coming mainly from the front driver's side. the odor even comes through the heater vents, but only with the blower on while the truck is at a stop. i have climbed under the truck and have stuck my nose in about every square inch under the hood, but i cannot pinpoint it. all vacuum lines are tight and the charcoal canister doesn't smell of fuel. i ran a simple OBD1 test and it says my O2 sensors need to be replaced. could this really be the problem? any help would be greatly appreciated.... oh yeah, she does have 236K on her original engine; if that helps at all... Thanks, Jason

 

[Jason Andrews]

Yes, it could be running rich in fuel. I'm sure mine needs those damn things too. Poor gas mileage? Run hot in the summer?...Also symptoms.

If new O2's doesn't fix it I will be surprised. Unless you have something loose. I sat in the very back seats of mine recently and could smell the same gas thing. Damn, guess It's that time Good luck! Oh, and WELCOME

 

[jhfj80]

yeah i suspected the O2 sensors may be causing it to run rich and somehow all the "leftover vapor" could be escaping out into the open; but i'm hesitant to spend over $200 on sensors in hopes that it is the problem. i'm thinking lately though that i should just suck it up, fork over some dough to the parts store, and at least have new sensors. she runs cool in the summer, but yes, MPG does seem worse than normal. and so far have found nothing loose; at least not as far as the FJ is concerned....

thanks for the input, and the birds up welcome....

 

[Jason Andrews]

IIRC you can get both sensors from CDan on this forum (toyota parts) and get both for $200.